1
st
Edition 1-8
Conventions
All numbers are expressed in decimal, except addresses and memory or register data, which are
expressed in hexadecimal. Where confusion may occur, decimal numbers have a ‘D’ subscript and
binary numbers have a ‘b’ subscript. The prefix ‘0x’ shows a hexadecimal number, following the ‘C’
programming language convention. Thus:
One dozen = 12
D
= 0x0C = 1100
b
The multipliers ‘k’, ‘M’ and ‘G’ have their conventional scientific and engineering meanings of *10
3
,
*10
6
and *10
9
respectively. The only exception to this is in the description of the size of memory areas,
when ‘K’, ‘M’ and ‘G’ mean *2
10
, *2
20
and *2
30
respectively.
$ Note: When describing transfer rates, ‘k’ ‘M’ and ‘G’ mean *10
3
, *10
6
and *10
9
not *2
10
, *2
20
and *2
30
.
In PowerPC terminology, multiple bit fields are numbered from 0 to n, where 0 is the MSB and n is the
LSB. PCI and VMEbus terminology follows the more familiar convention that bit 0 is the LSB and bit n
is the MSB.
Signal names follow the PICMG 2.0 R3.0 CompactPCI Specification. Signal names ending with a hash
(~) are active low; all other signals are active high.
This manual uses the following types of notice:
1) Notes call attention to important features or instructions, and are shown as follows:
$ Note: This is an example note entry.
2) Cautions call attention to actions that may cause system damage or loss of data, and are shown as
follows:
"CAUTION
This is an example caution entry.
3) Warnings call attention to actions that may cause risk of personal injury, and are shown as follows:
!WARNING
This is an example warning entry.
4) Recommendations give guidance on procedures that may be tackled in a number of ways, and are
shown as follows:
£RECOMMENDATION
This is an example recommendation
entry.
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